Exactly. I have zero trust in them, especially given their history of shady practices - like buying a VPN service (Onavo) and using it to track how people used competing apps.
It is - many restaurants have two menus, one for locals in thai and one for tourists. Prices in the first one are sometimes twice as cheap. (I've lived on Koh Samui for 3.5 years)
There are hints, so swiping doesn't seem unintuitive. Btw, I've used tinder-like gestures for my music discovery app based on Apple Music API ( https://itunes.apple.com/app/id1182799885 ). I think this pattern works perfectly for binary decisions.
I've tried all ad blockers from Safari extensions gallery - Adguard is the clear winner. Most powerful and customisable, yet uses Safari content block API.